package com.chixing.day06;

public class FinalDemo {
    //全局常量
    public static final String UNIVERSITY_NAME = "江苏大学";

    public static void main(String[] args) {
        //变量
        int a = 10;
        a = 20;

        //常量:值不能改变,final修饰,定义的时候就赋值，字母全部大写,多个单词通过下划线分割
        final String SALE_PLAY_FROM = "京东";

        double XX = Math.PI;
    }
}
